Validate file path in TermuxOpenReceiver

Bump version to 0.53

Bump version to 0.52

Bump version to 0.51

Change android:extractNativeLibs to false

We're trying this to see if that fixes an F-Droid build issue.

See termux#319.

Bump version to 0.49

Bump version to 0.48

Bump version to 0.47

Adjust text placement on feature graphics

Bump version to 0.45